Dave Barker, myself.

The fiber to the timing slave on h1susauxex I/O chassis does not latch into the SFP, and one fiber from the pair was not fully inserted into the SFP.  This caused the timing to be off by quite a bit.  The diagnostics for the timing fanout showed that nothing was connected to the port. While we were troubleshooting, we found that only one of the fibers latches into the SFP at the timing fanout. The latching tabs on the fiber may be bad, a new fiber should be tried to see if it latches any better.  For now, they are just pushed in and held by some nominal amount of friction, but this is not a permanent fix.  

At some point it would be useful to audit the other timing fibers, but if one is loose, it will cause problems with the models when it becomes detached from the SFP.